词汇。

给出首字母，在语境中补充完整单词，完成句子。

1. W _______ comes before Thursday.

2. — Which s________ do you like best? 

    — I like history best.

3. They went to the gym a moment a_______.

4. Jane could speak Chinese very well at the a_______ of ten.

5. Beijing is the c_______ of China.

关于MRI胸部扫描的叙述，正确的是（）

A.对肺部细小病灶及炎性病灶显示好

B.流空的血管腔与纵隔高信号脂肪形成鲜明对比

C.纵隔内较小的淋巴结的显示优于CT

D.MRI能准确地显示纵隔肿瘤的部位和侵犯范围

E.气管与主支气管腔内无氢质子呈高信号